It is inaccurate to say that you will get cold legs if you don’t wear fall pants. Old cold legs in medicine is usually called osteoarthritis, cold usually stimulate the patient joint damage, aggravate the original pain and discomfort symptoms, but not the cause of the disease, so do not wear fall pants will be old cold legs is wrong. Osteoarthritis is usually associated with knee trauma, wear and tear, joint cartilage aging and lower estrogen levels, etc. 1, knee trauma: if there has been a history of knee trauma, such as intra-articular meniscus rupture, cartilage swelling or cruciate ligament injuries, etc., which can lead to osteoarthritis of the knee joints occurring; 2, knee wear and tear: for track and field athletes, heavy laborers, obese people, etc., can be due to perennial overloading of the knee, thus leading to the occurrence of knee joints. Knee joint wear and tear: for athletes, heavy laborers, obese people, etc., the knee joint can be overloaded for many years, which leads to wear and tear of the knee joint and promotes the occurrence of osteoarthritis of the knee joint; 3, aging of articular cartilage: with age, the articular cartilage of the human body will be physiologically aged, such as the reduction of cartilage and joint fluid, thinning of cartilage, which will reduce the protection of the knee joint and lead to osteophytes, accelerating the occurrence of osteoarthritis of the knee joint, which is one of the reasons why it occurs more frequently in the old people. 4.Lowered estrogen level: the disease occurs in postmenopausal women, because estrogen can protect cartilage, but estrogen will decrease with age, especially after menopause, the articular cartilage of the knee joint is more susceptible to wear and tear, which leads to the occurrence of osteoarthritis of the knee joints; 5.Genetic factors: some studies have shown that certain genetic factors can accelerate the occurrence of osteoarthritis of the knee joints. After the onset of osteoarthritis of the knee joint, mainly manifested as pain during activities, limited joint activity, joint friction sound, joint deformation and other symptoms, when its part of the cold stimulation pain may be aggravated, at this time you can add clothing for warm treatment, under the guidance of the doctor to supplement glucosamine and other cartilage repair to alleviate the pain symptoms. If the pain is more severe, the patient can also be treated by intra-articular injection of drugs and arthroscopic joint cavity cleaning under the guidance of the doctor.